68 Works

Microscopic properties of grain boundaries in Cu(In,Ga)Se2 and CuInS2 thin-film solar cells studied by transmission electron microscopy

Sebastian Simon Schmidt
PhD thesis

Electrochemical and Photochemical Functionalization of Au and Si Surfaces by Grafting of Diazonium and Azide Compounds

Xin Zhang

Struktur und Gitterdynamik von Gruppe-V-Elementen in ZnO

Felice Friedrich

Strukturelle Charakterisierung von Wasserstoff trennenden Gasseparationsmembranen auf Lantanoid-Wolframat-Basis

Tobias Scherb
PhD thesis

Neutron Scattering Investigations on 3d and 4f Frustrated Magnetic Insulators

Diana Lucía Quintero Castro
PhD thesis

Structural trends in off stoichiometric chalcopyrite type compound semiconductors

Christiane Stephan
PhD thesis

Cd-freie Heterokontakte in Chalkopyrit-basierten Dünnschichtsolarzellen

David Kieven
PhD thesis

Local Structure of Al-based Amorphous Alloys after Microalloying by Element Substitution and after Ball Milling

Yao Liu
PhD thesis

Solid-supported lipid membranes and their response to varied environmental conditions

Martin Kreuzer
PhD thesis

Design of electron beam evaporated Si thin films for solid phase crystallized solar cells on glass

Tobias Sontheimer
PhD thesis

Clustering and Precipitation in Al-Mg-Si Alloys

Zeqin Liang
PhD thesis

Anomalous Small Angle X-ray Scattering (ASAXS) analysis of nanocrystals in glass ceramics: structure and composition

Vikram Singh Raghuwanshi
PhD thesis

Supplement to: Machine learning classification for field distributions of photonic modes

Carlo Barth & Christiane Becker
Electromagnetic modes of photonic nanostructures can exhibit increased near-field energy densities which can be applied in many fields such as biosensing, quantum dot solar cells or photon upconversion. Optimizing such systems enforces to systematically analyze large amounts of numerically obtained three-dimensional field distribution data, as in the presented dataset. The simulated system is a silicon photonic crystal slab on glass (subspace) with a hexagonal lattice of cylindrical holes. The holes are filled with a medium...

E4 - 2-Axis-Diffractometer

The instrument is primarily suited for magnetic structure determination under various conditions, which includes magnetic fields up to 17 T, temperatures down to 30 mK and pressures up to 10 kbar. The most common application is to reveal spatial arrangement ordered spin structures. Using the polarized neutrons option facilitates the separation of magnetic contributions from nuclear scattering. The measurement of flipping ratios allows registration of very weak magnetic scattering and the mapping of spin density...

V7 - Cold Neutron Tomography and Radiography (CONRAD)

The neutron tomography beam line V7 was designed with two measuring positions: the first one is located directly at the end of the neutron guide, where a very high neutron flux is available but the image resolution is limited due to the beam divergence. The second measuring position uses a pin-hole geometry followed by more than 5m of flight tube in order to gain a high collimation ratio and image resolution. The high-flux measuring position...

E11 - Fast Acquisition Laue Camera for Neutrons (FALCON)

Neutron Laue diffraction is an important method of neutron scattering for measuring single crystals. Laue diffraction patterns are generated in a matter of seconds from very small crystals i.e. <1mm3. FALCON has two scintillating plate detectors coupled to four iCCD cameras each, to produce a 2D projection of a large volume of reciprocal space in a single Laue pattern. Such images can be used to index complex crystal structures, characterise features such as twinning or...

Composites of Spherical Polyelectrolyte Brushes and Nanoparticles - Synthesis, Characterization and Their Use in Catalysis

Frank Polzer
PhD thesis

Electronic grain boundary properties in polycrystalline Cu(In,Ga)Se2 semiconductors for thin film solar cells

Robert Baier
PhD thesis

The Surface Charge of Soft and Hard Sphere Colloidal Particles – Experimental Investigation and Comparison to Theory

Christian Schneider
PhD thesis

Hydrogen Passivation of Polycrystalline Si Thin Film Solar Cells

Benjamin Gorka

Effizienzlimitierende Rekombinationsprozesse in amorph/kristallinen und polykristallinen Siliziumsolarzellen

Caspar Leendertz
PhD thesis

Zweiter Jahresbericht

E9 - Fine Resolution Powder Diffractometer (FIREPOD)

The Fine Resolution Powder Diffractometer E9 (FIREPOD) is an angle-dispersive powder diffractometer optimized for a flat resolution function with a minimum width of the reflections at the 2Θ-region with the highest density of reflections. The monochromator is placed at a distance of 11 m from the reactor core, which allows for a large take-off angle at the monochromator. An evacuated beam tube and a sapphire single crystal filter reduce air scattering and epithermal neutrons. Neutron...

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